I sometimes read about running because I cannot for the life of me understand why anybody does it without being chased by something scary! I've never been able to do it right so I don't do it at all. I have never in my life found any form of hard-core exercise to offer any sort of high -- just miserable sweaty discomfort!
I wonder what it would be like to find it pleasurable.
I do walk my two dogs twice a day, though. We go slower and slower as my little tripod beagle-mix sweetie gets older and older, so it's less of a workout than it used to be.